Mixing device



M. B. LLOYD May 3 1927.-

MIXING DEVICE Filed Feb. 9. 1 924 I] In A TTORNEY.

Patented May 3, 1927.

. MYRonn. LLOYD. or DETROIT, rrrorrrean.

MIXING nnvron,

Application filed February 9, 1924. Serial No."691,697,

. This invention relates to charge forming devices for internal combustlon engines and the ob ect of the nvention is to. provlde a charge forming device to prevent gasoline from being drawn into the engine in 4 its liquid form. I I

With the usual carburetor and the low test gasoline now available the" charge entering the engine is notwell vaporized and tends-to condense in the cylinder where it will pass down about the pistons into the lubricating oil of th'e engines. This is usually called crankcase dilution as the' oil 'in the crank fcase is-thusdiluted and-gradually loses its lubricating. value on this account and eventually results in injury to the engine.

The principal object of this invention is to produce a charge comprising a mixture of gasoline and air in which the gasoline is so'finely divided and vaporized 'that it is entirely consumed when exploded thus pre- I I i venting all possibility of crank case dilution.

Another object of the invention is to'pro- Vide a, charge forming deviceffor internal combustion engines comprising a carburetor for producing an'over rich mixture of gas oline and air which is heated and then thinned with an additional amountof air to apoint where it may be readily exploded.

These objects and the several novel features of the inventionare hereinafter more fullydes'cribed and claimed andthe pre M ferred'form of construction by which these U objects are attained is shown in the accompanylng drawings in wh1ch- Fig. 1 1s a View of my improved charge forming device as attached to the intake manifold of an lnte'rnal combustionengme.

Fig.2 is a longitudinal section through the charge forming device,

Fig. 3 is a section taken on line 3-3 of Fi 2- i is shown in Fig. 1 a tube 1 is provided v with the exhaust manifold 3.

which may be connected to a carburetor of any desired type. The carburetor is set to produce an over rich mixture of gasoline and'air which is drawn through. the tube 1 and into a tubular portion 2 castintegrally manifold becomes heated from the hot exhaust gases of the engine and this heat is transferred through the metal so that the tubular portion 2 also is heated. The over rich mixture is drawn from the tube 2 through the tube 4 which is attached to the v I threaded end 5 of the casing 6 by means of The exhaust i a nut 77. The casing 6 is provided with a longitudinal tube'8 having a Venturi tube i 9 secured inthe discharge end thereof by means of a screw 10. This casing G-is also provided Witlran inlettube 11 provided w th an'enlarged' portion 12 which is thread- I ed into the-casing 6" as shown in Fig. The

'casin 6 is also" provided with an enlarged chain er 13 about the tube 8 in communica .tion with the chamber 14 at the bottom of the air. inlet tube 11 and a shaft 15 extends through theltube8 and through the'lower end of the tube 11; A. butterfly valve 16 is secured to the shaft 15 within the tube 11 and a butterfly valve 17' is secured to the shaft 15 withinfthe tube 8. It willbenoted "that'these Valves are so set that upon turning the shaft 15. the tubes 8 and 11 are opened or closedsimultaneously. It will .be noted from Fig. 2 that the discharge end of the tube8 terminates atthe point of greatest restriction of a. Venturi tube 18 which is'heldin place in the chamber 13 by a set screw 19. Anannular space" 20 is thus provided between the discharge end of the tube 8 and the Venturi tube 18 and as the over rich mixtureof gasoline and air is air entering through the annular space 20 Venturi tube 18 until the mixture is thinned to the point of combustion and passes into will be noted that by meansfof the valves drawn throughxthe tube 8 it is further "va-- porlzed by the venturi '9'and as, it passes from the end of the tube 8 and venturi 9 'i is mixed with the over rlch mixture in the the intake manifold 21 ofthe engine. It 7 16 and 17 on the same shaft the flow of restriction. of the Venturi tube 9 that the proportion of air to the over rich gas mixture may be varied. until the correct areas.

are determined for the type of engine with which the device is to be used and this result may be accomplished by utilizing V enturi tubes 9 and 18 in which the areas of greatest restriction Vary'in diameter.

A butterfly valve 22 shown more particularly in'Fig. 2 may be provided in the upper end of the tube 11 and may be inde pendently operated from the drivers seat being' greater in diameter than the tube extending into said enlargement, the saidtherein and also having an enlargement on air inlet tube having its axis at a right angle 10 one side thereof, the chamber having a 'dist0 the axis of the fuel tube, a valve in the charge orifice, a venturi at the discharge fuel tube and a valve in the air inlet, and orifice, the fuel tube extending into the said means for jointly controlling the valves.

venturi in spaced relation therewith pro- In testimony whereof I sign this specividmg for a flow of a11- therehetween, an fication.

air inlet tube mounted in the casing and v MYRON B. LLOYD. I 

